UV Absorber 329

Product Overview

UV Absorber 329, chemically known as 2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole, represents a premier class of benzotriazole-type ultraviolet stabilizers. Engineered for high-performance polymer systems, this compound effectively absorbs harmful UV radiation in the 270 to 340 nanometer range. By converting absorbed UV energy into harmless thermal energy through a reversible tautomeric process, it significantly mitigates photo-oxidative degradation. This mechanism ensures prolonged service life and maintained mechanical integrity for susceptible materials exposed to harsh environmental conditions.

Our manufacturing process adheres to strict quality control protocols, ensuring high purity and consistent performance across batches. The product is characterized by low volatility, excellent compatibility with a wide range of resin systems, and robust thermal stability, making it an indispensable additive for modern material science applications.

Technical Specifications

We maintain rigorous testing standards to guarantee that every shipment meets international industry benchmarks. The following table outlines the key physical and chemical properties of our premium grade UV Absorber 329.

Industrial Applications

UV Absorber 329 is versatile and widely utilized across multiple polymer processing industries. Its primary function is to protect materials from yellowing, cracking, and loss of gloss caused by sunlight exposure. Key application areas include:

• Polyolefins: Highly effective in PE, PP, and polypropylene fibers.
• Engineering Plastics: Compatible with ABS, PC, PS, and epoxy resins.
• PVC Systems: Provides essential light stability for rigid and flexible PVC products.
• Coatings and Fibers: Enhances durability in synthetic fibers and protective coatings.
• Packaging Materials: Suitable for plastic containers and food packaging boxes requiring light stability.

Recommended dosage varies by application thickness. For thin films and products, a concentration of 0.1% to 0.5% is optimal. For thicker sections, 0.05% to 0.2% is typically sufficient to achieve desired protection levels without affecting clarity or processing characteristics.

Quality Assurance and Storage

As a leading global manufacturer, we provide comprehensive documentation including Certificates of Analysis (COA) with every shipment. Our facility ensures that the product remains non-toxic, non-flammable, and non-corrosive under standard handling conditions. UV Absorber 329 exhibits excellent storage stability when kept in a cool, dry environment away from direct sunlight. Packaging is available in 25kg cardboard drums lined with plastic bags, with custom options available upon request to suit specific logistical requirements.